Is AOT right for you?
Rebuild your resilience and energy
Adaptive Oxygen Training is not a one‑size‑fits‑all program
The first question - is it right for you at this stage of your health or performance journey?
That decision starts with a thorough initial assessment where Rosalba explores your medical history, current symptoms, breathing patterns, nervous system state, activity tolerance and goals, so the best approach is grounded in a clear understanding of your capacities and constraints.
If AOT is suitable, you’ll receive an individualised treatment plan that may include IHHT alongside breathing retraining, pacing strategies, nervous system regulation and other integrative supports.
Designed for complex chronic conditions and performance goals
AOT is designed to help you adapt to stress, effort and recovery by using precisely controlled oxygen stimuli.
Whether you are living with a complex medical condition or post‑viral syndrome, or you are an athlete or high performer wanting altitude‑style benefits without extra wear and tear, AOT is built to meet you where you are so you can safely tap into your body’s adaptive biology in a way that is individualised, paced and guided over time.
If you’re focused on performance
IHHT within AOT may be suitable if you are:
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A high‑performance or endurance athlete seeking altitude‑style adaptations without extra wear and tear
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A dedicated recreational athlete looking to improve recovery, metabolic efficiency and resilience to training stress
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A performer or professional working under high cognitive and emotional load who needs sharper recovery and sustainable performance
Athletic performance, fitness and recovery:
IHHT can offer altitude‑style training benefits at sea level, helping improve endurance, recovery and overall fitness for both competitive and recreational athletes when integrated sensibly into a training plan.
If you’re living with a medical condition
Areas IHHT may be considered helpful for include:
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General health, resilience and healthy ageing
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Cardiovascular health and blood pressure
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Metabolism, weight regulation and blood sugar control
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Brain health and cognitive resilience
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Stress tolerance and autonomic nervous system recovery
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Energy, mitochondrial function and fatigue‑related conditions
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Inflammation and inflammatory load
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ME/CFS and Long COVID (within a carefully paced, integrative plan)
General health
and resilience
IHHT supports the way your heart, blood vessels, metabolism and brain respond to everyday demands, helping the body adapt more efficiently to stressors. Adaptive hypoxic conditioning does not only act on individual cells; it also influences how the heart, blood vessels, metabolism and brain respond to everyday demands. When the dose and pattern are carefully controlled, it can help support more efficient cardiovascular regulation, better metabolic flexibility, improved energy and improved stress resilience. Intermittent hypoxia conditioning triggers a cascade of beneficial physiological adaptations spanning multiple organs and systems simultaneously — from the cardiovascular and respiratory systems to the brain and metabolic pathways. Rather than targeting a single condition, this makes IHHT a compelling non-pharmacological strategy with broad health potential, particularly when doses are carefully calibrated to remain in the therapeutic range.
Cardiovascular health and
blood pressure
Supervised IHHT programs may help improve exercise tolerance, blood pressure regulation and autonomic balance alongside standard cardiovascular care. Carefully dosed “hypoxic conditioning” can, over time, help the cardiovascular system respond more efficiently and is associated with reductions in resting heart rate and blood pressure in people with cardiovascular disease. Protocols designed to achieve hypoxic conditioning can promote adaptations similar to endurance training, such as improved blood pressure control and preservation of healthy vagal tone. This makes IHHT a candidate for supporting cardiovascular rehabilitation when used alongside standard approaches like diet, exercise and stress reduction. Clinical studies of intermittent hypoxia–hyperoxia protocols have reported improvements in exercise tolerance, cardiorespiratory fitness, and certain cardiovascular risk markers in adults, when delivered in structured, supervised programs. Preliminary evidence also points to benefits for autonomic dysregulation which can be a factor in some cardiovascular conditions and conditions with orthostatic intolerance such as POTS. Hypoxia without adaptation increases sympathetic nervous system activity, reduces parasympathetic tone, and raises heart rate and blood pressure to protect oxygen delivery to vital organs. With repeated, controlled intermittent hypoxia, these responses are “retrained” as part of the process called hypoxic conditioning. Clinical studies and meta analyses in people with cardiovascular disease report that appropriately prescribed intermittent hypoxia that leads to conditioning can lower resting heart rate and both systolic and diastolic blood pressure, while preclinical work shows protection against ischaemic injury and arrhythmias. Nitric oxide (NO) appears to play a key role in these benefits by supporting vascular function and helping to protect the endothelium from ischaemia reperfusion injury.
Brain health
and cognitive resilience
Carefully dosed hypoxic conditioning may activate protective pathways in the brain, supporting resilience and recovery when used with appropriate neurological and rehabilitation care. The brain has very high energy needs and is sensitive to oxidative stress. Carefully dosed intermittent hypoxia may help activate protective pathways that support brain resilience, cognitive function and healthier responses to mental stress. When the brain is injured — whether by stroke, trauma, or the slow progression of neurodegeneration — standard medical treatments frequently leave a significant gap in recovery. Emerging evidence identifies hypoxic conditioning as one of the strongest available strategies to trigger the brain's own protective and repair systems, offering new hope for preventing and reversing these conditions. Neurons require a lot of oxygen but have relatively limited antioxidant defenses, which makes them vulnerable to oxidative damage. Hypoxic conditioning can trigger antioxidant pathways (such as Nrf2) and pro survival signaling networks (such as Akt), which are also involved in classic “ischaemic preconditioning” that protects the brain and heart from later low oxygen insults. These changes can increase the brain’s capacity to tolerate and recover from metabolic or vascular stress. Because the sympathetic nervous system and adrenal medulla are central to the “fight or flight” response, and because hypoxia modulates these systems, controlled intermittent hypoxia may also influence how the body and brain respond to mental stress. Early research suggests that, within safe limits, hypoxic conditioning may support aspects of cognitive function, mood regulation and stress resilience, although this area is still developing and protocols must avoid the high doses that are known to impair sleep or drive chronic sympathetic overactivation
Metabolism and
weight
regulation
By influencing how the body uses glucose and fat, IHHT can support metabolic flexibility and help improve weight and blood sugar control when combined with good nutrition and movement. Managing blood sugar and body weight can feel like an uphill battle, especially when lifestyle changes alone aren't enough. Hypoxia affects how the body uses fuels such as glucose and fat and how it regulates appetite. In the right dose – especially when combined with exercise – hypoxic conditioning may support better metabolic flexibility, weight management and blood sugar control. Research suggests that controlled intermittent hypoxia sessions may help the body become more sensitive to insulin — meaning your cells can use blood sugar more effectively — and may support healthy weight management, particularly when combined with good nutrition and movement. Hypoxia influences nutrient supply and metabolism partly by altering hormones like ghrelin, leptin and insulin and by reshaping energy sensing pathways inside cells. At the cellular level, mild hypoxic conditioning pushes metabolism towards more oxygen independent energy production (glycolysis), which can lower blood glucose, particularly when paired with physical activity – a combination that may be helpful in obesity, insulin resistance and metabolic syndrome. Hypoxia and HIF signalling also modulate fat metabolism and substrate choice, temporarily reducing fatty acid oxidation and encouraging flexible switching between fuel sources rather than rigid dependence on one pathway. At very high intensities or durations, hypoxia can drive ATP depletion and muscle loss; therapeutic protocols deliberately stay within an adaptive window that aims to support metabolic health, not breakdown
Stress Tolerance
and Autonomic Nervous System Recovery
IHHT applies the principle of “small, manageable stress” to help rebalance the stress and recovery systems, and can be layered into broader nervous‑system‑retraining and stress‑recovery programs. Chronic stress, fatigue, and poor sleep often reflect not just an overactive stress response, but also an under-active recovery system — the body has lost its ability to fully shift into rest, repair, and recharge mode. Research suggests that structured IHHT sessions restores a healthier balance between the body's stress and recovery systems, with early clinical studies reporting positive changes in perceived fatigue, mood, and mental clarity in some individuals. One of the most well-established principles in adaptive medicine is that resilience is built gradually, by exposing the body to manageable doses of stress — whether that's physical exercise, heat, cold, fasting, or reduced oxygen. Adapting to one type of stressor tends to increase your tolerance to others: for example, training in the heat builds tolerance to altitude, and hypoxia conditioning appears to improve resilience to psychological and physical stress alike. IHHT is particularly well-suited to this approach because oxygen levels can be precisely controlled and adjusted in real time — making it one of the most dose-accurate tools available for building adaptive resilience, and one that can be layered alongside exercise, heat and cold therapy, and dietary practices for amplified effect.
Energy and Metabolism
IHHT sends a gentle training signal to mitochondria, which may help cells use fuel more efficiently and support better energy and stamina when combined with pacing, movement and nutrition. Many people living with chronic fatigue, metabolic conditions, or unexplained low energy may have underlying changes in how their cells produce power. Research suggests that controlled intermittent hypoxia–hyperoxia sessions can act as a gentle signal to help cells work more efficiently — supporting the tiny energy-producing structures inside them (mitochondria) and improving how the body handles fuel, particularly when combined with good nutrition and movement Your cells run on a molecule called ATP — think of it as the body's energy currency. ATP is made almost entirely inside mitochondria. When mitochondria aren't working well, every system in the body feels it: muscles fatigue quickly, thinking becomes foggy, and the body struggles to recover from ordinary demands. IHHT works by briefly and safely reducing the oxygen your body receives, then restoring it. This alternating pattern activates the body's built-in oxygen-sensing system — the same system that helps people adapt to altitude. When this system is switched on, it sends a cascade of signals that prompt cells to clear out older, less efficient mitochondria and build fresher, more capable ones. Scientists call this process mitochondrial turnover, and it's one of the key ways the body maintains its energy capacity. Early foundational research by Jain and colleagues (2016) found that activating the body's hypoxia response protected cells with mitochondrial dysfunction — improving energy outcomes in conditions where the normal oxygen-processing machinery was compromised. A key insight from that work, and from Mootha and Chinnery (2018), was that in already-stressed mitochondria, too much oxygen can actually make things worse by increasing damaging molecules called free radicals — suggesting that controlled, intermittent dips in oxygen may be gentler on these cells than continuous high-oxygen environments. In human studies, a clinical trial in people with metabolic syndrome found that 15 IHHT sessions over three weeks led to meaningful improvements in cholesterol, triglycerides, and markers of inflammation — changes that reflect real shifts in how the body processes fuel, without any changes to diet or exercise during the study period. Researchers also note that IHHT activates a molecule called AMPK — a kind of cellular fuel gauge — which helps muscles take up glucose more efficiently and supports the body's ability to burn fat for energy. These are the same pathways targeted by many lifestyle interventions, suggesting that IHHT may act as a complement to, not a replacement for, good nutrition and movement. The research on IHHT and energy metabolism is promising and growing, with studies spanning cellular biology, animal models, and human clinical trials. The strongest evidence currently applies to metabolic conditions and cardiovascular health. Research specifically in people with chronic fatigue and post-viral conditions is underway — with the first large, dedicated clinical trial currently enrolling participants. As with any therapy, individual responses vary, and results are best understood in the context of a comprehensive approach to health
Inflammation
and
antioxidants
IHHT may help reduce low‑grade inflammation and support the body’s own antioxidant defenses, especially when used alongside foundational lifestyle and medical care. Persistent, low-level inflammation quietly underlies many of the conditions that affect quality of life — from fatigue and pain to metabolic and cognitive health. Research into IHHT points to promising effects on oxidative stress and inflammatory markers, and its benefits appear greatest when combined with the foundations of good health: n ourishing food, regular movement, restorative sleep, and good medical support . Inflammation and oxidative stress are closely linked. Oxidative stress occurs when the body produces more damaging molecules (called free radicals) than its natural defenses can neutralize. Over time, this imbalance fuels low-grade inflammation that quietly erodes tissue health, energy, and resilience across many body systems. IHHT appears to work with the body's own antioxidant systems rather than simply suppressing inflammation from the outside. The controlled oxygen cycling activates protective pathways that upregulate the body's own free-radical-scavenging enzymes — including superoxide dismutase, glutathione peroxidase, and catalase — while simultaneously reducing levels of key inflammatory signaling molecules. This matters because strengthening the body's internal defenses tends to produce more sustainable results than blocking inflammation through medication alone. In a randomised controlled trial in patients with metabolic syndrome, IHHT produced significant reductions in high-sensitivity C-reactive protein (hs-CRP) — one of the most widely used clinical markers of systemic inflammation — as well as reductions in galectin-3 and heat shock proteins, all of which reflect improvement in the underlying inflammatory burden. A subsequent study by Bestavashvili, Glazachev et al. (2023) extended these findings, showing that IHHT also favourably shifted cardiometabolic risk markers — including TMAO levels, a gut-derived compound increasingly linked to cardiovascular inflammation — in the same patient population. Research by Serebrovska, Xi et al. (2022) explored IHHT's effects on inflammatory signaling in healthy older adults and people with early signs of cognitive impairment. The study found that IHHT upregulated specific adaptive inflammatory markers — not as a sign of harm, but as a trigger for cellular repair and reprogramming — and was associated with improvements in cognitive function and a reduction in markers associated with Alzheimer's-related pathology. Most recently, Ladriñán-Maestro, Sánchez-Sierra et al. (2026) published results from a six-week randomised controlled trial in older adults, finding that IHHT produced a statistically significant reduction in CRP levels alongside improvements in respiratory muscle strength and heart rate variability — a measure of autonomic nervous system balance — compared to a placebo group. As with all areas of IHHT research, evidence is growing and promising, but individual responses vary. These studies reflect real shifts in measurable biology, and they support the value of IHHT as one component of a thoughtful, integrative approach to reducing the inflammatory load that underlies so many chronic conditions.
ME, CFS and
Long COVID
IHHT targets several mechanisms relevant to ME/CFS and Long COVID, and is being formally studied in these conditions; in practice it is introduced cautiously within a precision‑paced, integrative plan. For people living with ME/CFS or Long COVID, even simple daily activities can be challenging — and recovery often feels out of reach. These conditions share features including poor cellular energy production, nervous system dysregulation, and persistent inflammation, which may all be relevant targets for IHHT. Previous sections have described how IHHT can have positive influences on all of these aspects of CFS. Reduced blood flow due to antoantibodies that target blood vessels may also be helped by IHHT. Early clinical research is showing meaningful improvements in energy, breathing, and quality of life, and a dedicated clinical trial in ME/CFS is currently underway. The physiological drivers of ME/CFS/long COVID are complex and multifaceted. A recent unifying theory that explains how the various changes are inter-related is based around the finding that some people with ME/CFS have autoantibodies that interfere with blood vessel function, particularly impairing the production of nitric oxide—a key molecule that helps blood vessels relax and deliver oxygen-rich blood throughout your body. This causes reduced blood flow and oxygen delivery to muscles and the brain, a primary driver of fatigue. An individualized approach is essential with ME/CFS and long COVID and IHHT needs to be combined with precision pacing, nervous system regulation, breathing retraining and other therapies and lifestyle practice to support energy, increased tolerance for activity, sleep and calm . The Problem: Autoantibodies, Nitric Oxide, and Poor Blood Flow Research has identified that some people with ME/CFS have autoantibodies—immune proteins that mistakenly target the body's own receptors. Specifically, these autoantibodies interfere with β2-adrenergic and M3 acetylcholine receptors, which normally help blood vessels relax and widen. When these receptors don't work properly, it creates a cascade of vascular problems. The blood vessels' ability to produce nitric oxide (NO)—a crucial molecule that signals blood vessels to relax and dilate—becomes impaired. Studies show that endothelial cells (the cells lining blood vessels) exposed to plasma from ME/CFS patients produce significantly less nitric oxide. This reduced NO production means blood vessels constrict instead of dilating properly, leading to reduced blood flow to muscles and the brain (hypoperfusion) and insufficient oxygen delivery to tissues (hypoxia). This pattern of poor blood flow and impaired nitric oxide function directly correlates with fatigue severity in ME/CFS. How IHHT May Address This IHHT works by exposing your body to carefully controlled periods of reduced oxygen alternating with high oxygen. This rhythmic pattern may help restore vascular function and compensate for autoantibody-driven problems in several ways: •Restoring nitric oxide production: Intermittent hypoxic training significantly increases nitric oxide metabolite levels—studies show up to 7-fold increases in some cases. This enhanced NO production helps counteract the impaired endothelial function seen in ME/CFS •Preventing endothelial dysfunction: Research demonstrates that intermittent hypoxia conditioning prevents the deterioration of endothelial function and improves the capacity of blood vessels to produce and store nitric oxide •Teaching cells to work more efficiently with limited oxygen—essentially adapting to "do more with less" when blood flow is compromised •Stimulating growth of new capillaries and improving small blood vessel function through HIF-1α activation, creating alternative pathways for blood flow that bypass impaired vessel dilation •Enhancing mitochondrial function—improving how your cellular energy factories extract energy from whatever oxygen does reach your tissues •Strengthening antioxidant defenses to reduce oxidative stress from chronic poor oxygen delivery The alternating hypoxic-hyperoxic pattern appears particularly effective because it increases beneficial nitric oxide production while preventing the harmful overproduction that can occur with tissue damage.
Breathing
Issues
IHHT may help strengthen breathing muscles and airway function in conditions like asthma, COPD and some neuromuscular or spinal cord–related breathing problems, as a complement to your usual care. At carefully controlled low doses, intermittent hypoxia appears to improve breathing strength and airway function in ways that standard treatments often cannot achieve alone. Research suggests meaningful benefits for people living with asthma, moderate COPD, spinal cord injury, and other conditions that affect breathing and movement, offering a promising and well-tolerated complementary approach. Breathing is controlled by the nervous system, and like other parts of the nervous system, the circuits that drive breathing can adapt and strengthen — a process called respiratory neuroplasticity. When the breathing control centers in the brain and spinal cord are exposed to brief, repeated episodes of mild oxygen reduction, they respond by forming stronger, more efficient connections. The result is more forceful, more coordinated breathing muscle activity — even in people whose breathing capacity has been reduced by injury or disease.https://pmc.ncbi.nlm.nih.gov/articles/PMC4315448/ This is quite different from how most breathing treatments work. Most therapies manage symptoms or open airways directly. Intermittent hypoxia works at the level of the nervous system itself, training the neural circuits that drive breathing to fire more effectively.https://cwe-inc.com/news/intermittent-hypoxia-laboratory-therapy What the research shows Foundational laboratory work by Nichols, Gowing et al. (2013) demonstrated that intermittent hypoxia helped preserve breathing capacity in an animal model of motor neurone disease (ALS) — one of the most severe conditions affecting respiratory muscle function. Critically, combining intermittent hypoxia with cell therapy showed complementary and additive benefits, pointing to its potential as part of a broader therapeutic strategy. https://pubmed.ncbi.nlm.nih.gov/23220913/ A landmark review by Dale, Ben Mabrouk and Mitchell (2014) synthesised the growing body of evidence showing that low-dose intermittent hypoxia reliably triggers respiratory motor plasticity — strengthening breathing contractions not just in the diaphragm but across a range of respiratory muscles, including those controlling the upper airway. This review was instrumental in shifting the field's understanding of intermittent hypoxia from something harmful (as seen in sleep apnoea) to something genuinely therapeutic when delivered at the right dose and pattern.https://pubmed.ncbi.nlm.nih.gov/24382870/ In people with COPD, a double-blind clinical trial by Burtscher et al. (2009) found that 15 sessions of intermittent hypoxia over three weeks significantly increased total exercise time (+9.7%) and time to the anaerobic threshold (+13%) compared to placebo — with no changes in the control group. These are meaningful real-world improvements for people whose breathlessness limits everyday activity. A broader review also confirmed that intermittent hypoxia training raises baroreflex sensitivity, improves hypercapnic ventilatory response, and increases lung diffusion capacity in COPD patients.https://pubmed.ncbi.nlm.nih.gov/20386436/ Sales de Campos, Olsen et al. (2023) provided a comprehensive state-of-the-art review of respiratory therapies for ALS, specifically introducing therapeutic intermittent hypoxia as an emerging tool for inducing respiratory plasticity — highlighting the growing clinical evidence base and mapping its potential to preserve breathing function as neurological decline progresses. https://pubmed.ncbi.nlm.nih.gov/37219417/ Most recently, the 2026 randomised controlled trial by Ladriñán-Maestro and Sánchez-Sierra et al. confirmed that six weeks of IHHT produced significant improvements in respiratory muscle strength and heart rate variability in older adults compared to a placebo group — providing controlled evidence of real respiratory benefit in a general clinical population.https://pubmed.ncbi.nlm.nih.gov/41590984/ A note on dose and context The distinction between harmful and helpful intermittent hypoxia is primarily one of dose, pattern, and duration. The kind of chronic, uncontrolled, severe oxygen drops associated with obstructive sleep apnoea are very different from the brief, mild, structured exposures used therapeutically. Well-designed IHHT protocols are monitored and individually adjusted — and the current evidence consistently supports safety and tolerability across a range of populations when delivered appropriately. https://pmc.ncbi.nlm.nih.gov/articles/PMC10519271/
A note on dose and context